Question about 2000 Mitsubishi Montero Sport

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Missing, loss of power, etc.

Total Problem Synopsis:
engine/idle shakes when in gear; feels like going to die; once in gear and not accelerating, engine seems to smooth out; acceleration is horrible though whether from take off or accelerating up a hill when already in higher gear; occassionally smell gasoline or something similar to starter fluid smells from exhaust; no smoking or anything; check engine light came on, reads "missing on cylinder 4".

Attempts to resolve:
Replaced spark plugs, wires; also replaced, but doubt would have impact on problem: PCV Valve, Air Filter, Plenum Gasket; Valve Cover Gaskets, Plug Gaskets, etc.

Any suggestions? It is the V6, 3.0L engine. I also firing chart and confirmed all my spark plugs/wires were in correct order.

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  • ajbauer1 May 11, 2010

    first you need to check the basics fuel, air, spark , compression. if you have a problem with anyone of these you are going to have problems. from what you said I would say check EGR operation and DFPEGR operation. the way you discribe it you should have some sort of DTC/code set on ecm/pcm. if the egr is in operation when you are at idle it would want to die at engine idle anyway also you could have a problem with injectors and or the wiring to the injectors, with the smell of fuel you are having a misfire event.

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I'm sorry I have no solution. The exact sane thing is wrong with mine. I have a 2004 ford focus. It shakes like crazy when I'm trying to go but as soon as I reach a consistent speed it fine. Same story going uphill. Also seems to drive better after driving for awhile except when I go uphill. It started doing this yesterday!

Posted on Jul 12, 2013

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Sounds from afar like a problem i had after installing after market spark plug cables on a diff. car. make sure you have factory-quality/ even mits. brand cables. (right parts vs. after mkt.?- no contest.)

Posted on May 06, 2009

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